256403283 has 16 divisors (see below), whose sum is σ = 351267840. Its totient is φ = 166281536.

The previous prime is 256403267. The next prime is 256403291. The reversal of 256403283 is 382304652.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 256403283 - 2⁴ = 256403267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256403243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18103 + ... + 28991.

It is an arithmetic number, because the mean of its divisors is an integer number (21954240).

Almost surely, 2^256403283 is an apocalyptic number.

256403283 is a deficient number, since it is larger than the sum of its proper divisors (94864557).

256403283 is a wasteful number, since it uses less digits than its factorization.

256403283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11106.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 256403283 is about 16012.5976343628. The cubic root of 256403283 is about 635.2936687003.

It can be divided in two parts, 256403 and 283, that added together give a triangular number (256686 = T₇₁₆).

The spelling of 256403283 in words is "two hundred fifty-six million, four hundred three thousand, two hundred eighty-three".